"He said something to the effect of, 'What are you doing tonight?' and she signaled 'sleep,'" a witness tells the new Us Weekly. "She was trying to be polite, but she was genuinely not interested. When a couple of her friends came up to join the conversation, he just walked away."

The actor, 36, had more luck later that night, when he was seen leaving a house party with a pretty brunette. As for his relationship with Seyfried, 25: "It's casual. They'e friends who hang out romantically from time to time and that's it," says a pal. "At one point, there was a chance it would develop into something more serious, but it never did. There's no commitment."